8281979 has 2 divisors, whose sum is σ = 8281980. Its totient is φ = 8281978.

The previous prime is 8281943. The next prime is 8281981. The reversal of 8281979 is 9791828.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8281979 is a prime.

Together with 8281981, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8281379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4140989 + 4140990.

It is an arithmetic number, because the mean of its divisors is an integer number (4140990).

Almost surely, 2^8281979 is an apocalyptic number.

8281979 is a deficient number, since it is larger than the sum of its proper divisors (1).

8281979 is an equidigital number, since it uses as much as digits as its factorization.

8281979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 44.

The square root of 8281979 is about 2877.8427684639. The cubic root of 8281979 is about 202.3227448522.

The spelling of 8281979 in words is "eight million, two hundred eighty-one thousand, nine hundred seventy-nine".